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3 years ago

Two parts of the food chain are described below:

Chemistry

2 answers:

weqwewe [10]3 years ago

6 0

Answer:

the answer is a

SVETLANKA909090 [29]3 years ago

5 0

Answer:

A: part 1 consumers, part 2 the sun

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ASAP NEED HELP PLSSS

lord [1]

Answer:

Volume = 5.73L

Explanation:

Data;

V1 = 3.75L

P1 = 0.980atm

P2 = 0.641atm

V2 = ?

This question involves the use of Boyle's law, which states that, the volume of a fixed mass of gas is inversely proportional to its pressure provided that temperature remains constant.

Mathematically,

V = kP, k = PV

P1V1 = P2V2 =P3V3=........=PnVn

P1V1 = P2V2

V2 = (P1 * V1) / P2

V2 = (0.980 × 3.75) / 0.641

V2 = 5.73L

The final volume of the gas is 5.73L

6 0

3 years ago

What are conjugate acid-base pairs? and how do i work them out??

Vadim26 [7]

Which acid based pairs

4 0

3 years ago

The pH of saliva is normally in the range of 6.4 to 7.0. However, when a person is ill, the person's saliva becomes more acidic.

aleksley [76]

Answer:

Concentration of hydrogen ion, $[H^+]=5.0118*10^{-6} M$

Explanation:

pH is defined as the negative logarithm of hydrogen ion's concentration.

The lower the value of pH, the higher the acidic the solution is.

The formula for pH can be written as:

$pH=-log[H^+]$

Given,

pH of the saliva of Marco = 5.3

To calculate: Hydrogen ion concentration in the saliva

Thus, applying in the formula as:

$pH=-log[H^+]$

$5.3=-log[H^+]$

So,

$log[H^+]=-5.3$

$[H^+]=10^{(-5.3)}$

$[H^+]=5.0118*10^{-6} M$

8 0

4 years ago

Pleaseee helpppp!!!!!!!!

Katarina [22]

Answer:

a covalent would be the two that are nonmetals

7 0

3 years ago

When an ionic compound such as sodium chloride (NaCl) is placed in water, the component atoms of the NaCl crystal dissociate int

sesenic [268]

Answer:

The solution expected to contain the greatest number of solute particles is: A) 1 L of 1.0 M NaCl

Explanation:

The number of particles is calculated as:

a) For Ionic compounds:

molarity × volume in liters × number of ions per unit formula.

b) For covalent compounds:

molarity × volume in liters

The difference is a factor which is the number of particles resulting from the dissociation or ionization of one mole of the ionic compound.

So, calling M the molarity, you can write:

# of particles = M × liters × factor

This table show the calculations for the four solutions from the list of choices:

Compound kind Particles in solution Molarity # of particles

(dissociation) (M) in 1 liter

A) NaCl ionic ions Na⁺ and Cl⁻ 1.0 1.0 × 1 × 2 = 2

B) NaCl ionic ions Na⁺ anc Cl⁻ 0.5 0.5 × 1 × 2 = 1

C) Glucose covalent molecules 0.5 0.5 × 1 × 1 = 0.5

D) Glucose covalent molecules 1.0 1.0 × 1 × 1 = 1

Therefore, the rank in increasing number of particles is for the list of solutions given is: C < B = D < A, which means that the solution expected to contain the greatest number of solute particles is the solution A) 1 L of 1.0 M NaCl.

8 0

3 years ago